I2c-compass: add -lm to linker
I2c-compass: add -lm to linker

Signed-off-by: Brendan Le Foll <3e0e8c4069934e8b47d99704927a85c66c0ceb33@intel.com>

yongli3/mraa,yangjae/mraa,intel-iot-devkit/mraa,tripzero/mraa,alext-mkrs/mraa,sundw2014/mraa,Jon-ICS/mraa,jontrulson/mraa,g-vidal/mraa,spitfire88/mraa,neuberfran/mraa,pctj101/mraa,Propanu/mraa,andreivasiliu2211/mraa,alext-mkrs/mraa,pctj101/mraa,zBMNForks/mraa,alex1818/mraa,spitfire88/mraa,malikabhi05/mraa,yangjae/mraa,mircea/mraa,matt-auld/mraa,sundw2014/mraa,andreivasiliu2211/mraa,nioinnovation/mraa,SyrianSpock/mraa,STANAPO/mraa,mircea/mraa,timrtoo/Intel,noahchense/mraa,malikabhi05/mraa,timrtoo/Intel,pctj101/mraa,damcclos/mraa,Propanu/mraa,noahchense/mraa,g-vidal/mraa,sundw2014/mraa,sergev/mraa,intel-iot-devkit/mraa,stefan-andritoiu/mraa,KurtE/mraa,seem-sky/mraa,whbruce/mraa,neuroidss/mraa,alexandru-elisei/mraa,KurtE/mraa,petreeftime/mraa,Hbrinj/mraa,Pillar1989/mraa,smileboywtu/mraa,nioinnovation/mraa,ProfFan/mraa,Jon-ICS/mraa,Hbrinj/mraa,allela-roy/mraa,neuberfran/mraa,seem-sky/mraa,zBMNForks/mraa,stefan-andritoiu/mraa,neuberfran/mraa,KurtE/mraa,petreeftime/mraa,anonymouse64/mraa,damcclos/mraa,ncrastanaren/mraa,petreeftime/mraa,w4ilun/mraa,arunlee77/mraa,alexandru-elisei/mraa,noahchense/mraa,yangjae/mraa,Hbrinj/mraa,timrtoo/Intel,jontrulson/mraa,ProfFan/mraa,Propanu/mraa,noahchense/mraa,w4ilun/mraa,allela-roy/mraa,arfoll/mraa,spitfire88/mraa,alexandru-elisei/mraa,arunlee77/mraa,intel-iot-devkit/mraa,Pillar1989/mraa,arunlee77/mraa,petreeftime/mraa,jontrulson/mraa,neuroidss/mraa,yoyojacky/mraa,w4ilun/mraa,yangjae/mraa,Meirtz/mraa,alext-mkrs/mraa,stefan-andritoiu/mraa,alex1818/mraa,alext-mkrs/mraa,ncrastanaren/mraa,andreivasiliu2211/mraa,whbruce/mraa,Meirtz/mraa,Hbrinj/mraa,seem-sky/mraa,stefan-andritoiu/mraa-gpio-chardev,Propanu/mraa,alexandru-elisei/mraa,intel-iot-devkit/mraa,andreivasiliu2211/mraa,stefan-andritoiu/mraa,ncrastanaren/mraa,pctj101/mraa,g-vidal/mraa,sergev/mraa,yongli3/mraa,Kiritoalex/mraa,stefan-andritoiu/mraa-gpio-chardev,neuberfran/mraa,Meirtz/mraa,whbruce/mraa,Kiritoalex/mraa,Kiritoalex/mraa,anonymouse64/mraa,g-vidal/mraa,stefan-andritoiu/mraa-gpio-chardev,yongli3/mraa,jontrulson/mraa,g-vidal/mraa,allela-roy/mraa,malikabhi05/mraa,spitfire88/mraa,ProfFan/mraa,SyrianSpock/mraa,mircea/mraa,tripzero/mraa,STANAPO/mraa,alext-mkrs/mraa,matt-auld/mraa,arfoll/mraa,nioinnovation/mraa,arunlee77/mraa,arfoll/mraa,sundw2014/mraa,whbruce/mraa,jontrulson/mraa,Jon-ICS/mraa,zBMNForks/mraa,yongli3/mraa,malikabhi05/mraa,neuberfran/mraa,KurtE/mraa,neuroidss/mraa,ncrastanaren/mraa,ProfFan/mraa,SyrianSpock/mraa,timrtoo/Intel,timrtoo/Intel,arfoll/mraa,Pillar1989/mraa,alex1818/mraa,sergev/mraa,yoyojacky/mraa,pctj101/mraa,seem-sky/mraa,smileboywtu/mraa,sergev/mraa,KurtE/mraa,stefan-andritoiu/mraa-gpio-chardev,arfoll/mraa,sundw2014/mraa,stefan-andritoiu/mraa,stefan-andritoiu/mraa-gpio-chardev,intel-iot-devkit/mraa,alexandru-elisei/mraa,Propanu/mraa,ncrastanaren/mraa,seem-sky/mraa,anonymouse64/mraa,w4ilun/mraa,smileboywtu/mraa,matt-auld/mraa,yongli3/mraa,noahchense/mraa,tripzero/mraa,damcclos/mraa,yoyojacky/mraa,sergev/mraa,malikabhi05/mraa,STANAPO/mraa